Richmond confirmed a Tigers player identified the Bulldogs fan at the centre of the remarks.

The Western Bulldogs said it had also been made aware of the incident.

"The club has a code of conduct established for its members, which prohibits such behaviour and it expects all Western Bulldogs members and fans abide by the principles stated in that code, as a condition of membership," the Bulldogs said in a statement.

"The club has sought and is awaiting further information from the AFL in relation to the incident."

The Bulldogs were involved in two separate instances of inappropriate supporter behaviour last season.

In May, club president Peter Gordon issued an apology after a fan hurled a racial slur at indigenous Melbourne defender Neville Jetta in the round seven match.

In round 22, a 70-year-old supporter was ejected from Etihad Stadium, fined and had his membership revoked after he racially abused indigenous Sydney Swans players Adam Goodes and Lance Franklin.